Question: Suppose that a relation schema is ( a , b , c ) . Which of the following must be a super key for the

Suppose that a relation schema is (a,b,c). Which of the following must be a super key for the schema?
(c)
(b,c)
[a]
a,b
[b]
a,b,c
a,c
Suppose that a relation schema is (a,b,c). Which of the following

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